For performance, and to avoid throttling, its great to use client-go informers. However, the default implementation ends up caching all instances impacting memory usage.

Would be great to investigate (lazily) caching only objects referenced in policies:

Also see:

• https://github.com/kubernetes/client-go/issues/832
• use custom pod informer to reduce the memory footprint in large scale clusters cloudnativelabs/kube-router#999
• Reduce memory footprint for secrets gardener/cert-management#55
• https://github.com/kubernetes/client-go/issues/871